[INFO] fetching crate tokio-cadence 0.3.0...
[INFO] testing tokio-cadence-0.3.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate tokio-cadence 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tokio-cadence 0.3.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tokio-cadence 0.3.0
[INFO] finished tweaking crates.io crate tokio-cadence 0.3.0
[INFO] tweaked toml for crates.io crate tokio-cadence 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate tokio-cadence 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a8ed57a33df7564a5623c2ec7157ca7eeca2cf808f4e9455fe3a967013e7809
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1a8ed57a33df7564a5623c2ec7157ca7eeca2cf808f4e9455fe3a967013e7809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a8ed57a33df7564a5623c2ec7157ca7eeca2cf808f4e9455fe3a967013e7809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a8ed57a33df7564a5623c2ec7157ca7eeca2cf808f4e9455fe3a967013e7809", kill_on_drop: false }`
[INFO] [stdout] 1a8ed57a33df7564a5623c2ec7157ca7eeca2cf808f4e9455fe3a967013e7809
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 41d73cf74239e151936bab8d6441b407015f710afc2dd7dde34b9f8b5d31f36b
[INFO] running `Command { std: "docker" "start" "-a" "41d73cf74239e151936bab8d6441b407015f710afc2dd7dde34b9f8b5d31f36b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling pin-project-lite v0.2.4
[INFO] [stderr]    Compiling tokio v1.2.0
[INFO] [stderr]    Compiling cadence v0.24.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling mio v0.7.7
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling tokio-cadence v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.91s
[INFO] running `Command { std: "docker" "inspect" "41d73cf74239e151936bab8d6441b407015f710afc2dd7dde34b9f8b5d31f36b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41d73cf74239e151936bab8d6441b407015f710afc2dd7dde34b9f8b5d31f36b", kill_on_drop: false }`
[INFO] [stdout] 41d73cf74239e151936bab8d6441b407015f710afc2dd7dde34b9f8b5d31f36b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0960d4b216cb8da44247ca642e10c6fb97c111f357e77554280fa823ea6056fb
[INFO] running `Command { std: "docker" "start" "-a" "0960d4b216cb8da44247ca642e10c6fb97c111f357e77554280fa823ea6056fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling tokio-cadence v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> examples/async_impl.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 | /                 &buf[..n]
[INFO] [stdout] 76 | |                     .lines()
[INFO] [stdout] 77 | |                     .filter_map(|line| {
[INFO] [stdout] 78 | |                         line.ok().and_then(|line| {
[INFO] [stdout] ...  |
[INFO] [stdout] 97 | |                         }
[INFO] [stdout] 98 | |                     });
[INFO] [stdout]    | |______________________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = &buf[..n]
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.09s
[INFO] running `Command { std: "docker" "inspect" "0960d4b216cb8da44247ca642e10c6fb97c111f357e77554280fa823ea6056fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0960d4b216cb8da44247ca642e10c6fb97c111f357e77554280fa823ea6056fb", kill_on_drop: false }`
[INFO] [stdout] 0960d4b216cb8da44247ca642e10c6fb97c111f357e77554280fa823ea6056fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 982bdd28e7cbdec727e1bff197b39c0392433e74319b6392ac85e8370d72f672
[INFO] running `Command { std: "docker" "start" "-a" "982bdd28e7cbdec727e1bff197b39c0392433e74319b6392ac85e8370d72f672", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> examples/async_impl.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 | /                 &buf[..n]
[INFO] [stderr] 76 | |                     .lines()
[INFO] [stderr] 77 | |                     .filter_map(|line| {
[INFO] [stderr] 78 | |                         line.ok().and_then(|line| {
[INFO] [stderr] ...  |
[INFO] [stderr] 97 | |                         }
[INFO] [stderr] 98 | |                     });
[INFO] [stderr]    | |______________________^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 let _ = &buf[..n]
[INFO] [stderr]    |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio-cadence` (example "async_impl") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tokio_cadence-0d3b3423b9653b9a)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test udp::tests::from ... ok
[INFO] [stdout] test udp::tests::from_bad_address ... ok
[INFO] [stdout] test worker::tests::handle_over_buffer_capacity ... ok
[INFO] [stdout] test worker::tests::handle_full_buffer ... ok
[INFO] [stdout] test worker::tests::handle_multi_item ... ok
[INFO] [stdout] test unix::tests::from ... ok
[INFO] [stdout] test worker::tests::handle_single_item ... ok
[INFO] [stdout] test unix::tests::emit_multi ... ok
[INFO] [stdout] test udp::tests::emit ... ok
[INFO] [stdout] test udp::tests::emit_multi ... ok
[INFO] [stdout] test unix::tests::emit ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tokio-cadence
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/udp.rs - udp::TokioBatchUdpMetricSink (line 72) - compile ... ok
[INFO] [stdout] test src/unix.rs - unix::TokioBatchUnixMetricSink (line 67) - compile ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "982bdd28e7cbdec727e1bff197b39c0392433e74319b6392ac85e8370d72f672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "982bdd28e7cbdec727e1bff197b39c0392433e74319b6392ac85e8370d72f672", kill_on_drop: false }`
[INFO] [stdout] 982bdd28e7cbdec727e1bff197b39c0392433e74319b6392ac85e8370d72f672